NL92057C - - Google Patents

Info

Publication number
NL92057C
NL92057C NL92057DA NL92057C NL 92057 C NL92057 C NL 92057C NL 92057D A NL92057D A NL 92057DA NL 92057 C NL92057 C NL 92057C
Authority
NL
Netherlands
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication date
Application granted granted Critical
Publication of NL92057C publication Critical patent/NL92057C/xx

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/15—Means counteracting entry of dirt; Built-in cleaning devices
    • E21D15/155—Built-in cleaning devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87378—Second valve assembly carried by first valve head

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Reciprocating Pumps (AREA)
  • Chairs Characterized By Structure (AREA)
  • Safety Valves (AREA)
  • Massaging Devices (AREA)
NL92057D 1953-09-24 NL92057C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26349/53A GB748374A (en) 1953-09-24 1953-09-24 Improvements in hydraulic pit props

Publications (1)

Publication Number Publication Date
NL92057C true NL92057C (en) 1900-01-01

Family

ID=10242283

Family Applications (2)

Application Number Title Priority Date Filing Date
NL191038D NL191038A (en) 1953-09-24
NL92057D NL92057C (en) 1953-09-24

Family Applications Before (1)

Application Number Title Priority Date Filing Date
NL191038D NL191038A (en) 1953-09-24

Country Status (6)

Country Link
US (1) US2713773A (en)
BE (1) BE532039A (en)
DE (1) DE977481C (en)
FR (1) FR1113337A (en)
GB (1) GB748374A (en)
NL (2) NL92057C (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE553227A (en) * 1955-06-10
DE1127841B (en) * 1955-08-13 1962-04-19 Kronprinz Ag Hydraulic pit ram
BE553228A (en) * 1955-12-08
NL211784A (en) * 1956-03-07
US2975803A (en) * 1956-04-19 1961-03-21 Blackhawk Mfg Co Pressure release and relief valve
DE1081848B (en) * 1956-06-28 1960-05-19 Becorit Grubenausbau Gmbh Hydraulic pit ram
GB894292A (en) * 1957-07-30 1962-04-18 Mastabar Mining Equip Co Ltd Improvements in or relating to hydraulic props, particularly pit props
NL233516A (en) * 1958-11-24 1965-06-25
GB962542A (en) * 1959-08-21 1964-07-01 Acrow Eng Ltd Improvements in and relating to hydraulic props
GB975826A (en) * 1961-01-31 1964-11-18 Dowty Mining Equipment Ltd Improvements relating to fluid flow control valves
GB2069048B (en) * 1980-01-21 1984-06-06 Commercial Shearing Longwall jacks
EP0938692A4 (en) * 1996-10-04 1999-12-29 Charles W Jones Stereographic book

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE553221C (en) * 1932-06-24 Matthias Rehse Piston pump
US947613A (en) * 1910-01-25 Bethlehem Steel Corp Hydraulic jack.
US1047007A (en) * 1912-02-02 1912-12-10 William J Drugan Hydraulic jack.
US1080062A (en) * 1912-02-17 1913-12-02 Bethlehem Steel Corp Pump mechanism for hydraulic jacks and like apparatus.
BE486663A (en) * 1948-01-12
GB640414A (en) * 1948-03-06 1950-07-19 Mavor & Coulson Ltd Improvements in props
DE943391C (en) * 1951-09-21 1956-05-17 Max Ehmke Pump with pressure medium drive

Also Published As

Publication number Publication date
DE977481C (en) 1966-08-18
FR1113337A (en) 1956-03-28
US2713773A (en) 1955-07-26
BE532039A (en) 1900-01-01
GB748374A (en) 1956-05-02
NL191038A (en) 1900-01-01

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